/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.hadoop.tsfile.record;

import org.apache.hadoop.io.Writable;
import org.apache.iotdb.tsfile.exception.write.UnSupportedDataTypeException;
import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType;
import org.apache.iotdb.tsfile.utils.Binary;
import org.apache.iotdb.tsfile.utils.StringContainer;
import org.apache.iotdb.tsfile.write.record.TSRecord;
import org.apache.iotdb.tsfile.write.record.datapoint.*;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

public class HDFSTSRecord implements Writable {

    /**
     * timestamp of this TSRecord.
     */
    private long time;
    /**
     * deviceId of this TSRecord.
     */
    private String deviceId;
    /**
     * all value of this TSRecord.
     */
    private List<DataPoint> dataPointList = new ArrayList<>();

    public long getTime() {
        return time;
    }

    public void setTime(long time) {
        this.time = time;
    }

    public String getDeviceId() {
        return deviceId;
    }

    public void setDeviceId(String deviceId) {
        this.deviceId = deviceId;
    }

    public List<DataPoint> getDataPointList() {
        return dataPointList;
    }

    public void setDataPointList(List<DataPoint> dataPointList) {
        this.dataPointList = dataPointList;
    }

    public HDFSTSRecord() {
    }

    /**
     * constructor of HDFSTSRecord.
     *
     * @param timestamp timestamp of this TSRecord
     * @param deviceId  deviceId of this TSRecord
     */
    public HDFSTSRecord(long timestamp, String deviceId) {
        this.time = timestamp;
        this.deviceId = deviceId;
    }

    public TSRecord convertToTSRecord() {
        TSRecord tsRecord = new TSRecord(time, deviceId);
        tsRecord.dataPointList = this.dataPointList;
        return tsRecord;
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeLong(time);
        out.writeInt(deviceId.getBytes(StandardCharsets.UTF_8).length);
        out.write(deviceId.getBytes(StandardCharsets.UTF_8));
        out.writeInt(dataPointList.size());
        for (DataPoint dataPoint : dataPointList) {
            out.write(dataPoint.getType().serialize());
            out.writeInt(dataPoint.getMeasurementId().getBytes(StandardCharsets.UTF_8).length);
            out.write(dataPoint.getMeasurementId().getBytes(StandardCharsets.UTF_8));
            switch (dataPoint.getType()) {
                case BOOLEAN:
                    out.writeBoolean((boolean) dataPoint.getValue());
                    break;
                case INT32:
                    out.writeInt((int) dataPoint.getValue());
                    break;
                case INT64:
                    out.writeLong((long) dataPoint.getValue());
                    break;
                case FLOAT:
                    out.writeFloat((float) dataPoint.getValue());
                    break;
                case DOUBLE:
                    out.writeDouble((double) dataPoint.getValue());
                    break;
                case TEXT:
                    out.writeInt(((Binary) dataPoint.getValue()).getLength());
                    out.write(((Binary) dataPoint.getValue()).getValues());
                    break;
                default:
                    throw new UnSupportedDataTypeException("The type isn't supported");
            }
        }
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        time = in.readLong();
        int lenOfDeviceId = in.readInt();
        byte[] deviceBytes = new byte[lenOfDeviceId];
        in.readFully(deviceBytes);
        int len = in.readInt();
        List<DataPoint> dataPoints = new ArrayList<>(len);

        for (int i = 0; i < len; i++) {
            TSDataType dataType = TSDataType.deserialize(in.readByte());
            int lenOfMeasurementId = in.readInt();
            byte[] c = new byte[lenOfMeasurementId];
            in.readFully(c);
            String measurementId = new String(c, StandardCharsets.UTF_8);
            switch (dataType) {
                case BOOLEAN:
                    dataPoints.add(new BooleanDataPoint(measurementId, in.readBoolean()));
                    break;
                case INT32:
                    dataPoints.add(new IntDataPoint(measurementId, in.readInt()));
                    break;
                case INT64:
                    dataPoints.add(new LongDataPoint(measurementId, in.readLong()));
                    break;
                case FLOAT:
                    dataPoints.add(new FloatDataPoint(measurementId, in.readFloat()));
                    break;
                case DOUBLE:
                    dataPoints.add(new DoubleDataPoint(measurementId, in.readDouble()));
                    break;
                case TEXT:
                    int stringLen = in.readInt();
                    byte[] b = new byte[stringLen];
                    in.readFully(b);
                    Binary binary = new Binary(b);
                    dataPoints.add(new StringDataPoint(measurementId, binary));
                    break;
                default:
                    throw new UnSupportedDataTypeException("The type isn't supported");
            }
        }
        dataPointList = dataPoints;
    }

    /**
     * output this HDFSTSRecord in String format.For example: {device id: d1 time: 123456 ,data:[
     * {measurement id: s1 type:INT32 value: 1 } {measurement id: s2 type: FLOAT value: 11.11 }
     * {measurement id: s3 type: BOOLEAN value: true }]}
     *
     * @return the String format of this TSRecord
     */
    @Override
    public String toString() {
        StringContainer sc = new StringContainer(" ");
        sc.addTail("{device id:", deviceId, "time:", time, ",data:[");
        for (DataPoint tuple : dataPointList) {
            sc.addTail(tuple);
        }
        sc.addTail("]}");
        return sc.toString();
    }

    /**
     * add one data point to this HDFSTSRecord.
     *
     * @param tuple data point to be added
     */
    public HDFSTSRecord addTuple(DataPoint tuple) {
        this.dataPointList.add(tuple);
        return this;
    }
}
